Product facts & methodology
Audio Visualizer turns local audio into animated canvas graphics. We document how it works, what it supports, and what it does not do.
Our principles
The product provides six curated looks, cover artwork, track and artist titles, clip selection, and local video/PNG exports. MP4/WebM availability depends on the browser. Smart recommendations use local rules, not an AI model.
The browser creates a temporary object URL and reads frequency data through the Web Audio API. No upload endpoint is used.
Guides do not encourage stream ripping or credential sharing. Visitors should use audio they own or have permission to publish.
Technical method
When you press play, the browser's Web Audio API provides frequency-bin values. JavaScript draws frequency-reactive styles and real time-domain waveforms onto an HTML canvas. MediaRecorder combines the canvas stream and audio for local real-time video export. The original file remains local.
Editorial policy
Each guide serves a specific workflow instead of repeating the same page with a different keyword.
Spotify and SoundCloud guides clearly state that the tool is independent and does not connect to or download from those services.
We avoid invented user counts, endorsements, speed claims, and unsupported “best” labels.
Browser codec support and device memory vary. The pages explain these constraints instead of promising universal compatibility.
Material product capability changes should update the homepage, relevant guides, structured data, sitemap dates, and this methodology page together.
Run the demo or use an audio file already on your device.
Open Audio Visualizer